Oksana GrigorievaMel Should Be Investigated

4/11/2012 7:20 PM PDT BY TMZ STAFF

EXCLUSIVE

Oksana Grigorieva is not publicly commenting about statements Mel Gibson allegedly made about her to screenwriter Joe Eszterhas, but her rep is doing the talking, and he tells TMZ authorities should launch a probe.

Eszterhas claims Mel talked about offing Oksana several times. To that Oksana's rep, Steve Jaffe says, "Mr. Eszterhas' charges are extremely serious and should be investigated by the authorities immediately."

Jaffe says Oksana has no comment. We're told she signed a confidentiality agreement with Mel when they ended their custody/money war.